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Call sheet · Q4'26

Western Digital (WDC)

Q4'26 earnings call · held August 5, 2026 · compared with the Q3'26 call · management-credibility review
4/12
Disclosure score
4 medium, 3 low flags
Financial quality
Bottom line
The market will cheer the 44% YoY revenue surge and 1,310‑bp margin expansion, but the real driver is a one‑off pricing uplift and a quietly shifting mix toward UltraSMR, which management says will cover ~60% of FY27 exabyte shipments. The binding constraint is whether UltraSMR can scale without yield penalties while delivering the promised cost‑per‑TB reductions. If UltraSMR fails to hit volume targets, pricing power evaporates and margins will revert. My view changes if the Q1 FY27 revenue comes in below $4.0B or if UltraSMR share is materially below 50%.

The 30-second version

  • Sleeper story: UltraSMR becomes the real growth engine
  • Obvious headline - 44% YoY revenue beat - but the real story is pricing elasticity
  • Risk: metric drift - exabyte growth rate disappears, replaced by absolute exabytes

What changed this quarter

MetricQ3'26Q4'26Change
Revenue$3.30B, +45% YoY$3.75B, +44% YoY+$0.45B, slight slowdown in YoY growth
EPS (GAAP)$2.72, +97% YoY$3.56, +109% YoY+$0.84, acceleration
Operating Income$1.30B, +116% YoY$1.66B, +126% YoY+$0.36B, acceleration
Gross Margin (percent)50.5%54.4% (up 1,310bps YoY)+3.9 pts, strong expansion
Operating Margin38.6%44.2% (up 1,610bps YoY)+5.6 pts, leverage improvement
Free Cash Flow$978M, 29% margin$1.30B, 34% margin+$322M, margin rise
Operating Cash Flow$1.10B$1.40B+$0.30B, improvement
CapEx$145M$108M-$37M, lower spend
Cloud Revenue$3.0B, +48% YoY$3.3B, +43% YoY+$0.3B, growth slowdown
Client Revenue$179M, +31% YoY$225M, +61% YoY+$46M, strong acceleration

Accountability tracked

4 new promises made3 narrative shifts flagged1 prior promise scored
Inside the full report
The complete write-up covers the full promise ledger with kept/missed calls, disclosure-quality scoring, the metrics-vanished check, verification items, and the questions to ask next quarter.
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Scores, kept-promise rates, and flags on this site reflect the author's opinion, applying a stated methodology to statements management made on public earnings calls. Informational and educational purposes only - not investment advice, a recommendation, or an offer to buy or sell any security. Sources believed reliable but not guaranteed; the author may hold positions in the securities discussed.

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